PLATE I. 



Ehblich's Figures — Iixustrating his Theoby. 



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C- 



Fig. 1. 

 a. Complement ; 6. Interme- 

 diary body; V. Beceptor; d. Part 

 of cell. 



"C 



Fig. 2. 

 Cell with different kinds of receptors, c. Ee- 

 ceptors. 



Fig. 3. 

 Showing separation of antitoxins, and 

 combination of toxins with free antitoxins. 



Fig. 4. 

 Showing the action of anti-comple- 

 ment, a. Complement ; i. Inter- 

 mediary body ; c. Beceptor ; d. Cell, 

 e. Anti-complement. 



